Karl Pilkington, best known for his podcasts with Ricky Gervais and Stephen Merchant and his travel show An Idiot Abroad goes on a quest to find out if intelligence really makes you happier.
| Actor | Role |
|---|---|
 Karl PilkingtonNot listed | Not listed |
 Ricky GervaisSelf | Self |
 Germaine GreerNot listed | Not listed |
 David IckeNot listed | Not listed |
 Will SelfSelf | Self |
| HHeinz WolffNot listed | Not listed |